<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      div {
        background-color: pink;
        /* 100px / 3.75px/vh = 26.67 */
        width: 26.667vw;
        height: 26.667vw;
        /* 25 / 3.75 = 6.667 */
        font-size: 6.667vw;
      }
    </style>
  </head>
  <body>
    <div>apple</div>
  </body>
</html>
